//
//  VisitorView.swift
//  sinaWB
//
//  Created by Macdav on 16/4/7.
//  Copyright © 2016年 Dav. All rights reserved.
//

import UIKit
//访客试图,处理用户未登录显示的信息
class VisitorView: UIView {
    //    MAEK 设置试图信息
    func setupInfo(imageName: String?, title: String){
        messageLabel.text = title
        
        // 如果图片名称为 nil，说明是首页，直接返回
        guard let imgName = imageName else {
            // 播放动画
            startAnim()
            
            return
        }
        iconView.image = UIImage(named: imgName)
        //隐藏小房子
        houseIconView.hidden = true
        sendSubviewToBack(maskIconView)
        
    }
    //    设置动画
    private func startAnim(){
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 20
        // 用在不断重复的动画上，当动画绑定的图层对应的视图被销毁，动画会自动被销毁
        anim.removedOnCompletion = false
        //把动画添加到图层
        iconView.layer.addAnimation(anim, forKey: nil)
    }
    //MARK 构造函数
    //initWithFrame是UIView指定的构造函数
    //是使用纯代码开发用的
    override init(frame: CGRect) {
        super.init(frame:frame)
        setupUI()
    }
    // initWithCoder - 使用 SB & XIB 开发加载的函数
    // 使用 sb 开始的入口
    // 导致如果使用 SB 开发，调用这个视图，会直接崩溃
    // fatalError("init(coder:) has not been implemented")
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setupUI()
    }
    //懒加载试图
    private lazy var iconView:UIImageView = UIImageView(imageName: "visitordiscover_feed_image_smallicon")
    //遮罩图层
    private lazy var maskIconView:UIImageView = UIImageView(imageName: "visitordiscover_feed_mask_smallicon")
    //    小房子
    private lazy var houseIconView:UIImageView = UIImageView(imageName: "visitordiscover_feed_image_house")
    //消息文字
    private lazy var messageLabel:UILabel = UILabel(title: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜")
    //    创建注册按钮
   lazy var registerButton:UIButton = UIButton(title: "注册", color: UIColor.orangeColor(), imageName: "common_button_white_disable")
    //    创建登录按钮
   lazy var loginButton:UIButton = UIButton(title: "登录", color: UIColor.darkGrayColor(), imageName: "common_button_white_disable")
}
extension VisitorView {
    //设置界面
    private func setupUI(){
        //        1 添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(messageLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        //        2 设置自动布局
        /**
        *  自动布局
        需要添加约束到父试图,子试图最好有一个统一的参照物
        */
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        // 图标
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1.0, constant: -60))
        //小房子
        addConstraint(NSLayoutConstraint(item: houseIconView, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: houseIconView, attribute: .CenterY, relatedBy: .Equal, toItem: iconView, attribute: .CenterY, multiplier: 1.0, constant: 0))
        //消息文字
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Top, relatedBy: .Equal, toItem: iconView, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 224))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        //        注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Left, relatedBy: .Equal, toItem: messageLabel, attribute: .Left, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
        //        登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Right, relatedBy: .Equal, toItem: messageLabel, attribute: .Right, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        //        遮罩图层
        //        VFL : 可视化格式语言
        //
        //        H 水平方向
        //        V 垂直方向
        //        | 边界
        //        [] 包装控件
        //        views: 是一个字典 [名字: 控件名] - VFL 字符串中表示控件的字符串
        //        metrics: 是一个字典 [名字: NSNumber] - VFL 字符串中表示某一个数值
        
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[mask]-0-|", options: [], metrics: nil, views: ["mask": maskIconView]))
        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[mask]-(btnHeight)-[regButton]", options: [], metrics: ["btnHeight": -36], views: ["mask": maskIconView, "regButton": registerButton]))
        backgroundColor = UIColor(white: 237.0/255.0, alpha: 1.0)
    }
}